SCPS268A September   2017  – February 2022 TIC10024-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  VS Pin
      2. 8.3.2  VDD Pin
      3. 8.3.3  Device Initialization
      4. 8.3.4  Device Trigger
      5. 8.3.5  Device Reset
        1. 8.3.5.1 VS Supply POR
        2. 8.3.5.2 Hardware Reset
        3. 8.3.5.3 Software Reset
      6. 8.3.6  VS Under-Voltage (UV) Condition
      7. 8.3.7  VS Over-Voltage (OV) Condition
      8. 8.3.8  Switch Inputs Settings
        1. 8.3.8.1 Input Current Source and Sink Selection
        2. 8.3.8.2 Input Enable Selection
        3. 8.3.8.3 Thresholds Adjustment
        4. 8.3.8.4 Wetting Current Configuration
      9. 8.3.9  Interrupt Generation and INT Assertion
        1. 8.3.9.1 INT Pin Assertion Scheme
        2. 8.3.9.2 Interrupt Idle Time (tINT_IDLE) Time
        3. 8.3.9.3 Microcontroller Wake-Up
        4. 8.3.9.4 Interrupt Enable / Disable And Interrupt Generation Conditions
        5. 8.3.9.5 Detection Filter
      10. 8.3.10 Temperature Monitor
        1. 8.3.10.1 Temperature Warning (TW)
        2. 8.3.10.2 Temperature Shutdown (TSD)
      11. 8.3.11 Parity Check And Parity Generation
      12. 8.3.12 Cyclic Redundancy Check (CRC)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Continuous Mode
      2. 8.4.2 Polling Mode
      3. 8.4.3 Additional Features
        1. 8.4.3.1 Clean Current Polling (CCP)
        2. 8.4.3.2 Wetting Current Auto-Scaling
  9. 9 Programming
    1. 9.1 SPI Communication Interface Buses
      1. 9.1.1 Chip Select ( CS)
      2. 9.1.2 System Clock (SCLK)
      3. 9.1.3 Slave In (SI)
      4. 9.1.4 Slave Out (SO)
    2. 9.2 SPI Sequence
      1. 9.2.1 Read Operation
      2. 9.2.2 Write Operation
      3. 9.2.3 Status Flag
    3. 9.3 Programming Guidelines
    4. 9.4 Register Maps
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Digital Switch Detection in Automotive Body Control Module
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
    3. 10.3 Systems Examples
      1. 10.3.1 Using TIC10024-Q1 in a 12 V Automotive System
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Receiving Notification of Documentation Updates
    2. 13.2 Community Resources
    3. 13.3 Trademarks
  14. 14Mechanical, Packaging, and Orderable Information

9.3 Programming Guidelines

When configuring the TIC10024-Q1, it is critical to follow the programming guideline summarized below (see Table 9-2) to ensure proper behavior of the device:

Table 9-2 TIC10024-Q1 Programming Guidelines
CategoryProgramming Requirement
Clean Current Polling (if CCP_INx = 1 in the CCP_CFG1 register)At least one input has to be enabled: IN_EN_x = 1 in the IN_EN register
Wetting current auto-scaling (if WC_CFG1 [22:21] != 2b’11)
  • The wetting current auto-scaling feature is only activated in the continuous mode: POLL_EN = 0 (1)
  • The wetting current auto-scaling only applies to 10mA or 15mA wetting currents: WC_INx bits = 3’b100, 3’b101, 3’b110, or 3’b111 in the WC_CFG0 and WC_CFG1 registers.(1)

Continuous mode

Polling mode

tPOLL_TIME and tPOLL_ACT_TIME settings have to meet the below requirement: tPOLL_TIME ≥ 1.3 × [ tPOLL_ACT_TIME + n × 24 μs + 10 μs](2)
  • n: the number of enabled channels configured in register IN_EN
  • tPOLL_TIME: timing setting configured in CONFIG[4:1]
  • tPOLL_ACT_TIME: timing setting configured in CONFIG[8:5]
(1) These are soft requirements to take advantage of the wetting current auto-scaling feature. The feature takes no effect otherwise.
(2) If CCP is enabled, add tCCP_TRAN +tCCP_TIME, where tCCP_TIME is the timing setting configured in CCP_CFG0[6:4]